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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include <stdlib.h> | |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
25 | #include <sys/stat.h> | |
26 | #include <libsigrok/libsigrok.h> | |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | #define LOG_PREFIX "input/chronovu-la8" | |
30 | ||
31 | #define DEFAULT_NUM_CHANNELS 8 | |
32 | #define DEFAULT_SAMPLERATE SR_MHZ(100) | |
33 | #define MAX_CHUNK_SIZE (4 * 1024) | |
34 | #define CHRONOVU_LA8_FILESIZE ((8 * 1024 * 1024) + 5) | |
35 | ||
36 | struct context { | |
37 | gboolean started; | |
38 | uint64_t samplerate; | |
39 | }; | |
40 | ||
41 | static int format_match(GHashTable *metadata) | |
42 | { | |
43 | int size; | |
44 | ||
45 | size = GPOINTER_TO_INT(g_hash_table_lookup(metadata, | |
46 | GINT_TO_POINTER(SR_INPUT_META_FILESIZE))); | |
47 | if (size == CHRONOVU_LA8_FILESIZE) | |
48 | return SR_OK; | |
49 | ||
50 | return SR_ERR; | |
51 | } | |
52 | ||
53 | static int init(struct sr_input *in, GHashTable *options) | |
54 | { | |
55 | struct context *inc; | |
56 | int num_channels, i; | |
57 | char name[16]; | |
58 | ||
59 | num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
60 | if (num_channels < 1) { | |
61 | sr_err("Invalid value for numchannels: must be at least 1."); | |
62 | return SR_ERR_ARG; | |
63 | } | |
64 | ||
65 | in->sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
66 | in->priv = inc = g_malloc0(sizeof(struct context)); | |
67 | ||
68 | inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate")); | |
69 | ||
70 | for (i = 0; i < num_channels; i++) { | |
71 | snprintf(name, 16, "%d", i); | |
72 | sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, name); | |
73 | } | |
74 | ||
75 | return SR_OK; | |
76 | } | |
77 | ||
78 | static int process_buffer(struct sr_input *in) | |
79 | { | |
80 | struct sr_datafeed_packet packet; | |
81 | struct sr_datafeed_meta meta; | |
82 | struct sr_datafeed_logic logic; | |
83 | struct sr_config *src; | |
84 | struct context *inc; | |
85 | gsize chunk_size, i; | |
86 | int chunk; | |
87 | ||
88 | inc = in->priv; | |
89 | if (!inc->started) { | |
90 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
91 | ||
92 | if (inc->samplerate) { | |
93 | packet.type = SR_DF_META; | |
94 | packet.payload = &meta; | |
95 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate)); | |
96 | meta.config = g_slist_append(NULL, src); | |
97 | sr_session_send(in->sdi, &packet); | |
98 | sr_config_free(src); | |
99 | } | |
100 | ||
101 | inc->started = TRUE; | |
102 | } | |
103 | ||
104 | packet.type = SR_DF_LOGIC; | |
105 | packet.payload = &logic; | |
106 | logic.unitsize = (g_slist_length(in->sdi->channels) + 7) / 8; | |
107 | ||
108 | /* Cut off at multiple of unitsize. */ | |
109 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; | |
110 | ||
111 | for (i = 0; i < chunk_size; i += chunk) { | |
112 | logic.data = in->buf->str + i; | |
113 | chunk = MIN(MAX_CHUNK_SIZE, chunk_size - i); | |
114 | logic.length = chunk; | |
115 | sr_session_send(in->sdi, &packet); | |
116 | } | |
117 | g_string_erase(in->buf, 0, chunk_size); | |
118 | ||
119 | return SR_OK; | |
120 | } | |
121 | ||
122 | static int receive(struct sr_input *in, GString *buf) | |
123 | { | |
124 | int ret; | |
125 | ||
126 | g_string_append_len(in->buf, buf->str, buf->len); | |
127 | ||
128 | if (!in->sdi_ready) { | |
129 | /* sdi is ready, notify frontend. */ | |
130 | in->sdi_ready = TRUE; | |
131 | return SR_OK; | |
132 | } | |
133 | ||
134 | ret = process_buffer(in); | |
135 | ||
136 | return ret; | |
137 | } | |
138 | ||
139 | static int end(struct sr_input *in) | |
140 | { | |
141 | struct context *inc; | |
142 | struct sr_datafeed_packet packet; | |
143 | int ret; | |
144 | ||
145 | if (in->sdi_ready) | |
146 | ret = process_buffer(in); | |
147 | else | |
148 | ret = SR_OK; | |
149 | ||
150 | inc = in->priv; | |
151 | if (inc->started) { | |
152 | packet.type = SR_DF_END; | |
153 | sr_session_send(in->sdi, &packet); | |
154 | } | |
155 | ||
156 | return ret; | |
157 | } | |
158 | ||
159 | static struct sr_option options[] = { | |
160 | { "numchannels", "Number of channels", "Number of channels", NULL, NULL }, | |
161 | { "samplerate", "Sample rate", "Sample rate", NULL, NULL }, | |
162 | ALL_ZERO | |
163 | }; | |
164 | ||
165 | static struct sr_option *get_options(void) | |
166 | { | |
167 | if (!options[0].def) { | |
168 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
169 | options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE)); | |
170 | } | |
171 | ||
172 | return options; | |
173 | } | |
174 | ||
175 | SR_PRIV struct sr_input_module input_chronovu_la8 = { | |
176 | .id = "chronovu-la8", | |
177 | .name = "Chronovu-LA8", | |
178 | .desc = "ChronoVu LA8", | |
179 | .exts = (const char*[]){"kdt", NULL}, | |
180 | .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED }, | |
181 | .options = get_options, | |
182 | .format_match = format_match, | |
183 | .init = init, | |
184 | .receive = receive, | |
185 | .end = end, | |
186 | }; |